Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15819e52c91b9b8…

MALICIOUS

PDF

45.4 KB Authoring application: Pdftk
MD5: 1ff0a6c1d84131656869659f98219752 SHA-1: 07017d627723c71142d77cebb8210a33f8ec511f SHA-256: c15819e52c91b9b8d23f6df47c91714aaf3dbc6a9ce5cefa9a1bf730c420c071
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically points to a large number of external links embedded within the document, with 'serenitymasssage.services' being a dominant host. This suggests the document is likely used for SEO manipulation or to redirect users to potentially harmful content, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://serenitymasssage.services/uploads/1/3/0/6/130620454/pasugomakofa.pdf
    • http://jitone.hldent.ru/uploads/2020/01/28/5386718.pdf
    • http://youarethebestyou.com/uploads/1/3/0/2/130273748/seset.pdf
    • http://saccma.org/uploads/1/3/0/5/130590208/2872177.pdf
    • http://soharrell.com/uploads/1/3/0/7/130740133/gonepapededipet.pdf
    • https://bawefomubaduver.weebly.com/uploads/1/3/0/4/130483842/voxijitexoduboj.pdf
    • http://psychotherapie57000.fr/uploads/1/3/0/6/130621140/fixudugekurejub.pdf
    • http://bloodsugarbikemagic.com/uploads/1/3/0/5/130551399/7381152.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/3/130313198/130313198.html#forum.+xda-+developers.+com+android+hacking

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001205.bin
c009760ba125ddaa47c52e81e0139b3a027151fcefa48cbfa612bd2b87e05638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1205 9008 bytes
font_01_sfnt_off000063cf.bin
8c066796bb6e57654a75eb1e5f06c29a50512b8332b0ee033bbc023858455a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 18308 bytes

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